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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: CoreIndex.html 743 2015-01-28 21:39:47Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.core;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.NavigableMap;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.NavigableSet;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import org.jsimpledb.index.Index;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import org.jsimpledb.kv.KeyFilter;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import org.jsimpledb.tuple.Tuple2;<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>/**<a name="line.17"></a>
<span class="sourceLineNo">018</span> * Core API {@link Index} implementation representing a index on a single field.<a name="line.18"></a>
<span class="sourceLineNo">019</span> *<a name="line.19"></a>
<span class="sourceLineNo">020</span> * &lt;p&gt;<a name="line.20"></a>
<span class="sourceLineNo">021</span> * Instances are immutable.<a name="line.21"></a>
<span class="sourceLineNo">022</span> * &lt;/p&gt;<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * @param &lt;V&gt; index value type<a name="line.24"></a>
<span class="sourceLineNo">025</span> * @param &lt;T&gt; index target type<a name="line.25"></a>
<span class="sourceLineNo">026</span> */<a name="line.26"></a>
<span class="sourceLineNo">027</span>public class CoreIndex&lt;V, T&gt; extends AbstractCoreIndex implements Index&lt;V, T&gt; {<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>// Constructors<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>    CoreIndex(Transaction tx, IndexView&lt;V, T&gt; indexView) {<a name="line.31"></a>
<span class="sourceLineNo">032</span>        super(tx, 2, indexView);<a name="line.32"></a>
<span class="sourceLineNo">033</span>    }<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>// Methods<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>    @Override<a name="line.37"></a>
<span class="sourceLineNo">038</span>    public CoreIndex&lt;V, T&gt; filter(int index, KeyFilter filter) {<a name="line.38"></a>
<span class="sourceLineNo">039</span>        return new CoreIndex&lt;V, T&gt;(this.tx, this.getIndexView().filter(index, filter));<a name="line.39"></a>
<span class="sourceLineNo">040</span>    }<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>    @SuppressWarnings("unchecked")<a name="line.42"></a>
<span class="sourceLineNo">043</span>    IndexView&lt;V, T&gt; getIndexView() {<a name="line.43"></a>
<span class="sourceLineNo">044</span>        return (IndexView&lt;V, T&gt;)this.indexView;<a name="line.44"></a>
<span class="sourceLineNo">045</span>    }<a name="line.45"></a>
<span class="sourceLineNo">046</span><a name="line.46"></a>
<span class="sourceLineNo">047</span>// Index<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span>    @Override<a name="line.49"></a>
<span class="sourceLineNo">050</span>    public NavigableSet&lt;Tuple2&lt;V, T&gt;&gt; asSet() {<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>        // Get index view<a name="line.52"></a>
<span class="sourceLineNo">053</span>        final IndexView&lt;V, T&gt; iv = this.getIndexView();<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>        // Create tuple field type<a name="line.55"></a>
<span class="sourceLineNo">056</span>        final Tuple2FieldType&lt;V, T&gt; tupleFieldType = new Tuple2FieldType&lt;V, T&gt;(iv.getValueType(), iv.getTargetType());<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>        // Build set and apply filtering<a name="line.58"></a>
<span class="sourceLineNo">059</span>        IndexSet&lt;Tuple2&lt;V, T&gt;&gt; indexSet = new IndexSet&lt;Tuple2&lt;V, T&gt;&gt;(this.tx, tupleFieldType, iv.prefixMode, iv.prefix);<a name="line.59"></a>
<span class="sourceLineNo">060</span>        if (iv.hasFilters())<a name="line.60"></a>
<span class="sourceLineNo">061</span>            indexSet = indexSet.filterKeys(new IndexKeyFilter(this.tx, iv, 2));<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>        // Done<a name="line.63"></a>
<span class="sourceLineNo">064</span>        return indexSet;<a name="line.64"></a>
<span class="sourceLineNo">065</span>    }<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span>    @Override<a name="line.67"></a>
<span class="sourceLineNo">068</span>    public NavigableMap&lt;V, NavigableSet&lt;T&gt;&gt; asMap() {<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span>        // Get index view<a name="line.70"></a>
<span class="sourceLineNo">071</span>        final IndexView&lt;V, T&gt; iv = this.getIndexView();<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>        // Build map and apply filtering<a name="line.73"></a>
<span class="sourceLineNo">074</span>        IndexMap&lt;V, NavigableSet&lt;T&gt;&gt; indexMap = new IndexMap.OfValues&lt;V, T&gt;(this.tx, iv);<a name="line.74"></a>
<span class="sourceLineNo">075</span>        if (this.indexView.hasFilters())<a name="line.75"></a>
<span class="sourceLineNo">076</span>            indexMap = indexMap.filterKeys(new IndexKeyFilter(this.tx, iv, 1));<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span>        // Done<a name="line.78"></a>
<span class="sourceLineNo">079</span>        return indexMap;<a name="line.79"></a>
<span class="sourceLineNo">080</span>    }<a name="line.80"></a>
<span class="sourceLineNo">081</span>}<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>




























































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